On Migration respect old DefaultBranch (#12843)

* On Migration respect old DefaultBranch

* add DefaultBranch int test set

Co-authored-by: zeripath <art27@cantab.net>

modules/migrations/base/repo.go

@@ -16,4 +16,5 @@ type Repository struct {
 	AuthPassword  string
 	CloneURL      string
 	OriginalURL   string
+	DefaultBranch string
 }

modules/migrations/gitea.go

@@ -122,6 +122,7 @@ func (g *GiteaLocalUploader) CreateRepo(repo *base.Repository, opts base.Migrate
 	if err != nil {
 		return err
 	}
+	r.DefaultBranch = repo.DefaultBranch
 
 	r, err = repository.MigrateRepositoryGitData(g.doer, owner, r, base.MigrateOptions{
 		RepoName:       g.repoName,

modules/migrations/github.go

@@ -143,6 +143,11 @@ func (g *GithubDownloaderV3) GetRepoInfo() (*base.Repository, error) {
 	}
 	g.rate = &resp.Rate
 
+	defaultBranch := ""
+	if gr.DefaultBranch != nil {
+		defaultBranch = *gr.DefaultBranch
+	}
+
 	// convert github repo to stand Repo
 	return &base.Repository{
 		Owner:         g.repoOwner,
@@ -151,6 +156,7 @@ func (g *GithubDownloaderV3) GetRepoInfo() (*base.Repository, error) {
 		Description:   gr.GetDescription(),
 		OriginalURL:   gr.GetHTMLURL(),
 		CloneURL:      gr.GetCloneURL(),
+		DefaultBranch: defaultBranch,
 	}, nil
 }
 

modules/migrations/github_test.go

@@ -77,6 +77,7 @@ func TestGitHubDownloadRepo(t *testing.T) {
 		Description:   "Test repository for testing migration from github to gitea",
 		CloneURL:      "https://github.com/go-gitea/test_repo.git",
 		OriginalURL:   "https://github.com/go-gitea/test_repo",
+		DefaultBranch: "master",
 	}, repo)
 
 	topics, err := downloader.GetTopics()

modules/migrations/gitlab.go

@@ -145,6 +145,7 @@ func (g *GitlabDownloader) GetRepoInfo() (*base.Repository, error) {
 		Description:   gr.Description,
 		OriginalURL:   gr.WebURL,
 		CloneURL:      gr.HTTPURLToRepo,
+		DefaultBranch: gr.DefaultBranch,
 	}, nil
 }
 

modules/migrations/gitlab_test.go

@@ -42,6 +42,7 @@ func TestGitlabDownloadRepo(t *testing.T) {
 		Description:   "Test repository for testing migration from gitlab to gitea",
 		CloneURL:      "https://gitlab.com/gitea/test_repo.git",
 		OriginalURL:   "https://gitlab.com/gitea/test_repo",
+		DefaultBranch: "master",
 	}, repo)
 
 	topics, err := downloader.GetTopics()

modules/repository/repo.go

@@ -102,7 +102,8 @@ func MigrateRepositoryGitData(doer, u *models.User, repo *models.Repository, opt
 		return repo, fmt.Errorf("git.IsEmpty: %v", err)
 	}
 
-	if !opts.Releases && !repo.IsEmpty {
+	if !repo.IsEmpty {
+		if len(repo.DefaultBranch) == 0 {
 			// Try to get HEAD branch and set it as default branch.
 			headBranch, err := gitRepo.GetHEADBranch()
 			if err != nil {
@@ -111,11 +112,14 @@ func MigrateRepositoryGitData(doer, u *models.User, repo *models.Repository, opt
 			if headBranch != nil {
 				repo.DefaultBranch = headBranch.Name
 			}
+		}
 
+		if !opts.Releases {
 			if err = SyncReleasesWithTags(repo, gitRepo); err != nil {
 				log.Error("Failed to synchronize tags to releases for repository: %v", err)
 			}
 		}
+	}
 
 	if err = repo.UpdateSize(models.DefaultDBContext()); err != nil {
 		log.Error("Failed to update size for repository: %v", err)